Use After Free Vulnerability in Microsoft Word
CVE-2025-62558

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Enterprise Server 2016
Microsoft Sharepoint Server 2019
Microsoft Office 2019
Microsoft 365 Apps For Enterprise
Vendor
CVE Published:
9 December 2025

What is CVE-2025-62558?

A use after free vulnerability exists in Microsoft Word that enables an attacker to execute arbitrary code on a victim's machine. This flaw can be exploited if a user opens a specially crafted document, potentially leading to unauthorized control over the system. Proper security measures and updates are essential to protect against this issue.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Office 2019 32-bit Systems 19.0.0

Microsoft Office LTSC 2021 x64-based Systems 16.0.1

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-62558 : Use After Free Vulnerability in Microsoft Word